Display device

Abstract

A display device includes: a substrate including a display area composed of a plurality of pixels disposed in a matrix; lower electrodes each formed in each of the plurality of pixels on the substrate and composed of a conductor; an organic layer formed on the lower electrodes and including a light-emitting layer; an upper electrode formed on the organic layer and composed of a conductor; and a pixel separation film at least a portion of which includes polymer dispersed liquid crystal, the pixel separation film being in contact with edges of the lower electrodes to insulate between the lower electrodes of the pixels adjacent to each other.

What is claimed is: 
     
       1. A display device comprising:
 a substrate including a display area composed of a plurality of pixels disposed in a matrix; 
 lower electrodes each formed in each of the plurality of pixels on the substrate and composed of a conductor; 
 an organic layer formed on the lower electrodes and including a light-emitting layer; 
 an upper electrode formed on the organic layer and composed of a conductor; and 
 a pixel separation film including a first layer composed of an insulating material and a second layer composed of polymer dispersed liquid crystal, the pixel separation film being in contact with edges of the lower electrodes to insulate between the lower electrodes of the pixels adjacent to each other, the first layer not including the polymer dispersed liquid crystal, the second layer having a part on and in directly physical contact with the lower electrodes. 
 
     
     
       2. The display device according to  claim 1 , wherein
 a degree of light scattering of the pixel separation film changes due to a change in potential difference between the upper electrode and the lower electrodes. 
 
     
     
       3. The display device according to  claim 2 , wherein
 the polymer dispersed liquid crystal has light scattering properties which increase with an increasing electric field applied thereto, while the polymer dispersed liquid crystal is brought into a state of transmitting incident light with no electric field is applied, and 
 the degree of the light scattering of the pixel separation film increases as the potential difference between the upper electrode and the lower electrodes increases. 
 
     
     
       4. The display device according to  claim 1 , wherein
 the first layer is formed of a material having a higher light-shielding property than the second layer, located at an opposite side of the second layer from the lower electrodes, and formed in contact with the second layer without being in contact with the lower electrodes. 
 
     
     
       5. The display device according to  claim 1 , wherein
 the first layer has a top surface and a side surface intersecting with the top surface, 
 the second layer is located at an opposite side of the first layer from the lower electrode, and covers the top surface and the side surface. 
 
     
     
       6. A display device comprising:
 a substrate including a first pixel and a second pixel adjacent to the first pixel; 
 a first lower electrode located in the first pixel; 
 a second lower electrode located in the second pixel; 
 a first organic layer formed on the first lower electrode and including a light-emitting layer; 
 a second organic layer formed on the second lower electrode and including a light-emitting layer; 
 a pixel separation film located at a boundary between the first pixel and the second pixel, the pixel separation film including a first layer composed of an insulating material and a second layer composed of polymer dispersed liquid crystal, the first layer not including the polymer dispersed liquid crystal, the second layer having a part on and in directly physical contact with the first and second lower electrodes; and 
 an upper electrode formed to straddle the first pixel, the second pixel, and the pixel separation film. 
 
     
     
       7. The display device according to  claim 6 , wherein
 the polymer dispersed liquid crystal has light scattering properties which increase with an increasing electric field applied thereto, while the polymer dispersed liquid crystal is brought into a state of transmitting incident light with no electric field is applied, and 
 a degree of light scattering of the pixel separation film increases as a potential difference between the upper electrode and the first and second lower electrodes increases. 
 
     
     
       8. The display device according to  claim 6 , wherein
 the first layer is formed of a material having a higher light-shielding property than the second layer, located at an opposite side of the second layer from the first and second lower electrodes, and formed on and in contact with the second layer without being in contact with the first and second lower electrodes. 
 
     
     
       9. The display device according to  claim 6 , wherein
 the first layer has a top surface and a side surface intersecting with the top surface, 
 the second layer is located at an opposite side of the first layer from the first and second lower electrode, and covers the top surface and the side surface.